From cecc9ef576a8e1a4210f6934656d20e7b3acd2f0 Mon Sep 17 00:00:00 2001
From: Tom Moor <tom@getoutline.com>
Date: Sat, 30 May 2026 16:48:19 -0400
Subject: [PATCH] perf: Lazy import Mammoth dep (#12538)

---
 server/utils/DocumentConverter.ts | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/server/utils/DocumentConverter.ts b/server/utils/DocumentConverter.ts
index 3b4011078a..c58e9ca7a4 100644
--- a/server/utils/DocumentConverter.ts
+++ b/server/utils/DocumentConverter.ts
@@ -2,7 +2,6 @@ import { parse } from "@fast-csv/parse";
 import { JSDOM } from "jsdom";
 import { escapeRegExp } from "es-toolkit/compat";
 import { simpleParser } from "mailparser";
-import mammoth from "mammoth";
 import type { Node } from "prosemirror-model";
 import { DOMParser as ProsemirrorDOMParser } from "prosemirror-model";
 import yaml from "js-yaml";
@@ -259,6 +258,8 @@ export class DocumentConverter {
    */
   private static async docxToHtml(content: Buffer | string): Promise<string> {
     if (content instanceof Buffer) {
+      // Loaded lazily to keep mammoth off the startup path — only docx imports need it.
+      const mammoth = (await import("mammoth")).default;
       const { value } = await traceFunction({ spanName: "convertToHtml" })(
         mammoth.convertToHtml
       )({